US4550483A - Method of manufacturing a structure with a fixed and a movable part provided with optical fibres - Google Patents

Method of manufacturing a structure with a fixed and a movable part provided with optical fibres Download PDF

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Publication number
US4550483A
US4550483A US06/502,693 US50269383A US4550483A US 4550483 A US4550483 A US 4550483A US 50269383 A US50269383 A US 50269383A US 4550483 A US4550483 A US 4550483A
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United States
Prior art keywords
fibres
fixed
movable part
optical
carrier
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Expired - Fee Related
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US06/502,693
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Lars P. Ingre
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/3502—Optical coupling means having switching means involving direct waveguide displacement, e.g. cantilever type waveguide displacement involving waveguide bending, or displacing an interposed waveguide between stationary waveguides
    • G02B6/3508—Lateral or transverse displacement of the whole waveguides, e.g. by varying the distance between opposed waveguide ends, or by mutual lateral displacement of opposed waveguide ends
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3834—Means for centering or aligning the light guide within the ferrule
    • G02B6/3838—Means for centering or aligning the light guide within the ferrule using grooves for light guides
    • G02B6/3839—Means for centering or aligning the light guide within the ferrule using grooves for light guides for a plurality of light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4403—Optical cables with ribbon structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
    • G02B6/3562—Switch of the bypass type, i.e. enabling a change of path in a network, e.g. to bypass a failed element in the network
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/3564—Mechanical details of the actuation mechanism associated with the moving element or mounting mechanism details
    • G02B6/3568—Mechanical details of the actuation mechanism associated with the moving element or mounting mechanism details characterised by the actuating force
    • G02B6/3572—Magnetic force
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y10T29/49796—Coacting pieces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49813—Shaping mating parts for reassembly in different positions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/97—Miscellaneous

Definitions

  • the present invention relates to a method of manufacturing a structure including a fixed and a movable part provided with optical fibres, to provide an optical switching function.
  • a function is used in fibre-optical relays for switching between a first plurality of fibres and a second plurality of fibres.
  • optical fibres may be used which are mechanically moved in relation to each other so that light from an incoming fibre can be optionally switched to one of several alternative outgoing fibres.
  • Several different solutions to such optical switching functions have been proposed such as shown, for example, in British Pat. No. 1,580,109 and in German Offenlegungsschrift No. 3,012,450.
  • the disadvantage of the prior is the magnitude of cost of handling the fibres in the provision of the switching function.
  • the fibres must have their ends cut or ground flat and placed correctly within very narrow limits in relation to each other both axially and radially if optical attenuation is to be kept low.
  • An object of the present invention is to provide an improved method of manufacturing fixed and movable parts included in an optical-fibre switching structure of the kind mentioned above.
  • the invention has as a primary application inclusion in a relay such as described in Swedish Patent Application No. 8204085-8.
  • a further object of the invention is to provide a method of manufacturing a relay wherein the handling of fibres is at a minimum during manufacture without spoiling the performance of the relay switching function.
  • a method of manufacturing a structure which includes fixed and movable parts provided with optical fibres included in an optical fibre relay in which an optical switching function is performed by moving the movable parts from an aligned rest position and relative to the fixed part in a direction at right angles to the axial direction of the fibres to coupling position, said fibres being fixed in mutually parallel relation and with a given spacing on a common carrier, said method comprising separating the carrier and the fibres along a cut at right angles to the axial direction of the fibres to form the fixed part and the movable part such that mutually conforming fibre end surfaces are formed which are mutually opposing in said rest position.
  • the orientation of the aforesaid parts is maintained after the cut such that when returning of the movable part to the rest position after movement to the coupling position the fibre end surfaces are again in mutually opposing relationship in substantially the same position.
  • the parting of the carrier and fibres in performed by cutting with a cutting tool.
  • a guide and an edge of the carrier are formed with corresponding shapes with the method further comprising displacing the edge of the movable parts from and against the guide to displace the fibres from and back to mutually opposing relationship.
  • FIG. 1 is a perspective view of a base plate with optical fibres, forming the basic material in the method of manufacture according to the invention
  • FIG. 2 is a cross section of the base plate and fibres according to FIG. 1,
  • FIG. 3 is the same base plate with fibres according to FIG. 1 but cut according to the proposed method and,
  • FIG. 4 is a perspective view of the fixed part and the movable part during aligning after parting has been carried out.
  • a flat plate 1 forms the common base plate for carrier for three optical fibres A1-A2, B1-B2 and C1-C2.
  • the plate 1 is suitably made from silicon and has a planar upper side 1a and at least one completely planar edge surface 1b.
  • the fibres A1-A2, B1-B2 and C1-C2 are fixed in parallel to the upper side 1a with a given spacing.
  • FIG. 2 the fixation of the fibres can be carried out with the aid of three V-grooves 2a-2c. These grooves are conventionally formed by etching along the planar surface 1a in the axial direction of the fibres, with the use of a photographic imprint.
  • the walls of the V-grooves form a given angle to the normal (about 35°) due to the crystallinic properties of the silicon material, a so-called AT section.
  • the fibres A1-A2, B1-B2, and C1-C2 are then glued or otherwise bonded to the respective grooves.
  • the positions of the fibres can also be fixed without grooves on the plate 1, with the aid of a precision tool for positioning the fibres during the adhering process.
  • the plate and fibres are parted along a cut X--X as shown in FIG. 3. Parting can be accomplished with by a cutting tool, e.g. a power saw, the plate being parted so that the cut X--X is substantially at right angles to the planar edge surface 1b.
  • a cutting tool e.g. a power saw
  • Two parts 3a and 3b are thus formed, with the fibre ends A1, B1 and C1 on part 3a and the fibre ends A2, B2 and C2 on part 3b, the end surfaces of the respective fibres conforming mutually.
  • the switching function is obtained by placing the parts 3a and 3b with their undersides against a reference plane as illustrated in FIG. 4, so that they meet at the cut X--X according to FIG. 3.
  • the parts 3a, 3b are oriented as they were before parting, the initially unparted fibres A1-A2, B1-B2 and C1-C2 being optically coupled.
  • This initial situation is easy to provide with very small mechanical tolerances, which gives low optical attentuation at the junctions of the fibre ends.
  • the initial position accoding to FIG. 3 has been provided with the air of a guide member 5 resting on the reference plane 4.
  • the part 3a may constitute the fixed part in a fibre optical relay according to the above-mentioned Swedish Patent Application and is firmly bonded to the substructure.
  • the guide member is replaced by a piece of soft iron with one edge surface lying against the edge surface 1a of the fixed part 3a and also partly against the edge surface 1b of the movable part 3b.
  • Switching is obtained by displacing the movable part along the reference plane parallel to the cut X--X a distance equal to the fibre spacing ⁇ from the initial position.
  • the connection B1-A2, C1-B2 may be obtained by switching.
  • the actuation of the movable part 3b is obtained with a magnetically activated actuating arm.
  • the movable part 3b Under the action of the actuating arm, the movable part 3b will be fixed in its position with the aid of a guide plate after switching.
  • the edge surface 1d must then be completely planar, so that on its engagement against the guide plate the center lines of the fibre ends B1-A2 and C1-B2 (as described above) will coincide.
  • the end surfaces of the fibres A1-A2, B1-B2 and C1-C2 are in practically perfect mutual alignment and the attenuation across the switching point is very low.
  • the switching position according to the above e.g. when the end surface of the fibre B1 is mated with the end surface of the fibre A2 a certain small deviation is impossible to avoid and the somewhat higher attenuation must possibly be compensated by an amplifier.
  • the fibre end surfaces are once again practically perfectly aligned and attenuation is minimal. No compensating amplification is therefore necessary in the associated loop.
  • the low attenuation over the switching point enables passive bypass connection of a large number of nodes in cascade along a transmission path such as a loop, without the need of introducing repeaters.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

A method of manufacturing an optical fibre relay structure including fixed and movable parts provided with mutually parallel optical fibres. The fibres are fixed to a base plate in V-shaped grooves with the aid of gluing or bonding. The base plate and fibres are then parted by a cut at right angles to the axial direction of the fibres and to a planar edge surface of the base plate. There is thus obtained two mutually conforming parts respectively forming the fixed part and the movable part in the optical fibre relay.

Description

FIELD OF INVENTION
The present invention relates to a method of manufacturing a structure including a fixed and a movable part provided with optical fibres, to provide an optical switching function. Such a function is used in fibre-optical relays for switching between a first plurality of fibres and a second plurality of fibres.
BACKGROUND
In order to provide an optical switching function in an optical relay, optical fibres may be used which are mechanically moved in relation to each other so that light from an incoming fibre can be optionally switched to one of several alternative outgoing fibres. Several different solutions to such optical switching functions have been proposed such as shown, for example, in British Pat. No. 1,580,109 and in German Offenlegungsschrift No. 3,012,450.
The disadvantage of the prior is the magnitude of cost of handling the fibres in the provision of the switching function. The fibres must have their ends cut or ground flat and placed correctly within very narrow limits in relation to each other both axially and radially if optical attenuation is to be kept low.
SUMMARY OF INVENTION
An object of the present invention is to provide an improved method of manufacturing fixed and movable parts included in an optical-fibre switching structure of the kind mentioned above. The invention has as a primary application inclusion in a relay such as described in Swedish Patent Application No. 8204085-8.
A further object of the invention is to provide a method of manufacturing a relay wherein the handling of fibres is at a minimum during manufacture without spoiling the performance of the relay switching function.
In achieving the above and other objects of the invention, there is provided a method of manufacturing a structure which includes fixed and movable parts provided with optical fibres included in an optical fibre relay in which an optical switching function is performed by moving the movable parts from an aligned rest position and relative to the fixed part in a direction at right angles to the axial direction of the fibres to coupling position, said fibres being fixed in mutually parallel relation and with a given spacing on a common carrier, said method comprising separating the carrier and the fibres along a cut at right angles to the axial direction of the fibres to form the fixed part and the movable part such that mutually conforming fibre end surfaces are formed which are mutually opposing in said rest position. The orientation of the aforesaid parts is maintained after the cut such that when returning of the movable part to the rest position after movement to the coupling position the fibre end surfaces are again in mutually opposing relationship in substantially the same position.
In further accordance with the invention, the parting of the carrier and fibres in performed by cutting with a cutting tool. Moreover, a guide and an edge of the carrier are formed with corresponding shapes with the method further comprising displacing the edge of the movable parts from and against the guide to displace the fibres from and back to mutually opposing relationship.
BRIEF DESCRIPTION OF DRAWING
The invention will next be described in detail with reference to the accompanying drawing wherein:
FIG. 1 is a perspective view of a base plate with optical fibres, forming the basic material in the method of manufacture according to the invention,
FIG. 2 is a cross section of the base plate and fibres according to FIG. 1,
FIG. 3 is the same base plate with fibres according to FIG. 1 but cut according to the proposed method and,
FIG. 4 is a perspective view of the fixed part and the movable part during aligning after parting has been carried out.
BEST MODES FOR CARRYING OUT THE INVENTION
In FIG. 1, a flat plate 1 forms the common base plate for carrier for three optical fibres A1-A2, B1-B2 and C1-C2. The plate 1 is suitably made from silicon and has a planar upper side 1a and at least one completely planar edge surface 1b. The fibres A1-A2, B1-B2 and C1-C2 are fixed in parallel to the upper side 1a with a given spacing. It will be seen from FIG. 2 that the fixation of the fibres can be carried out with the aid of three V-grooves 2a-2c. These grooves are conventionally formed by etching along the planar surface 1a in the axial direction of the fibres, with the use of a photographic imprint. The walls of the V-grooves form a given angle to the normal (about 35°) due to the crystallinic properties of the silicon material, a so-called AT section. The fibres A1-A2, B1-B2, and C1-C2 are then glued or otherwise bonded to the respective grooves. The positions of the fibres can also be fixed without grooves on the plate 1, with the aid of a precision tool for positioning the fibres during the adhering process.
When the fibres have been fixed on the carrier plate 1, the plate and fibres are parted along a cut X--X as shown in FIG. 3. Parting can be accomplished with by a cutting tool, e.g. a power saw, the plate being parted so that the cut X--X is substantially at right angles to the planar edge surface 1b.
Two parts 3a and 3b are thus formed, with the fibre ends A1, B1 and C1 on part 3a and the fibre ends A2, B2 and C2 on part 3b, the end surfaces of the respective fibres conforming mutually.
The switching function is obtained by placing the parts 3a and 3b with their undersides against a reference plane as illustrated in FIG. 4, so that they meet at the cut X--X according to FIG. 3. The parts 3a, 3b are oriented as they were before parting, the initially unparted fibres A1-A2, B1-B2 and C1-C2 being optically coupled. This initial situation is easy to provide with very small mechanical tolerances, which gives low optical attentuation at the junctions of the fibre ends. In FIG. 4, the initial position accoding to FIG. 3 has been provided with the air of a guide member 5 resting on the reference plane 4.
The part 3a may constitute the fixed part in a fibre optical relay according to the above-mentioned Swedish Patent Application and is firmly bonded to the substructure. In the relay the guide member is replaced by a piece of soft iron with one edge surface lying against the edge surface 1a of the fixed part 3a and also partly against the edge surface 1b of the movable part 3b. Switching is obtained by displacing the movable part along the reference plane parallel to the cut X--X a distance equal to the fibre spacing δ from the initial position. For example, the connection B1-A2, C1-B2 may be obtained by switching. In the relay according to the above-mentioned Swedish Patent Application the actuation of the movable part 3b is obtained with a magnetically activated actuating arm.
Under the action of the actuating arm, the movable part 3b will be fixed in its position with the aid of a guide plate after switching. The edge surface 1d must then be completely planar, so that on its engagement against the guide plate the center lines of the fibre ends B1-A2 and C1-B2 (as described above) will coincide.
In the initial position, the end surfaces of the fibres A1-A2, B1-B2 and C1-C2 are in practically perfect mutual alignment and the attenuation across the switching point is very low. In the switching position according to the above, e.g. when the end surface of the fibre B1 is mated with the end surface of the fibre A2 a certain small deviation is impossible to avoid and the somewhat higher attenuation must possibly be compensated by an amplifier. After switching back to the initial position, the fibre end surfaces are once again practically perfectly aligned and attenuation is minimal. No compensating amplification is therefore necessary in the associated loop.
The low attenuation over the switching point enables passive bypass connection of a large number of nodes in cascade along a transmission path such as a loop, without the need of introducing repeaters.

Claims (3)

What is claimed is:
1. A method of manufacturing a structure including fixed and movable parts provided with optical fibres included in an optical fibre relay in which an optical switching function is performed by moving the movable part from an aligned rest position and relative to the fixed part in a direction at right angles to the axial direction of the fibres to a coupling position, said fibres (A1-A2, B1-B2, C1-C2) being fixed in mutually parallel relation and with a given spacing (δ) on a common carrier (1), said method comprising separating the carrier and the fibres along a cut at right angles to the axial direction of the fibres to form the fixed part and the movable part (3a and 3b) such that mutually conforming fibre end surfaces are formed and mounting said parts for relative movement such that said end surfaces of said fibres are mutually opposing in said rest position after said cut, and upon a returning of the movable part to said rest position after the same has been moved to said coupling position, the fibre end surfaces are again in mutually opposing relation and in substantially the same position.
2. A method as claimed in claim 1, wherein the parting of the carrier and fibres is performed by cutting with a cutting tool.
3. A method as claimed in claim 1 wherein a guide and an edge of the carrier are formed with corresponding shapes, said method comprising displacing said edge of the movable part from and against said guide to displace the fibres from and back to mutually opposing relation.
US06/502,693 1982-07-01 1983-06-09 Method of manufacturing a structure with a fixed and a movable part provided with optical fibres Expired - Fee Related US4550483A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8204086A SE8204086L (en) 1982-07-01 1982-07-01 PROCEDURE TO MANUFACTURE ONE WITH OPTICAL FIBERS PROVIDED FIXED AND MUCH PART
SE8204086 1982-07-01

Publications (1)

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US4550483A true US4550483A (en) 1985-11-05

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US (1) US4550483A (en)
EP (1) EP0098816A3 (en)
JP (1) JPS5922004A (en)
CA (1) CA1225821A (en)
DK (1) DK301883A (en)
ES (1) ES523715A0 (en)
FI (1) FI832201L (en)
NO (1) NO832397L (en)
SE (1) SE8204086L (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
US4804241A (en) * 1986-12-08 1989-02-14 Chevron Research Company Optical fiber holder
EP0883011A1 (en) * 1997-06-06 1998-12-09 Lucent Technologies Inc. Optical fiber switch having enhanced alignment

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DE3835923A1 (en) * 1988-10-18 1990-04-19 Siemens Ag METHOD FOR PRODUCING AN OPTICAL SWITCH
IT1240310B (en) * 1989-07-24 1993-12-07 Pirelli Cavi Spa SEPARABLE CONNECTION GROUP FOR OPTICAL FIBERS COMBINED WITH BELT AND RELATED METHOD OF REALIZATION.
DE4012510A1 (en) * 1990-04-12 1991-10-17 Siemens Ag METHOD FOR MAKING AN OPTICAL WAVE SWITCH
US5187758A (en) * 1990-07-17 1993-02-16 Fujitsu Limited Method of fabricating optical switch
DE4204567C2 (en) * 1992-02-13 1999-10-07 Siemens Ag Optical switch
DE4230171C2 (en) * 1992-09-09 1997-10-09 Siemens Ag Light guide switch
DE10132428A1 (en) * 2001-07-04 2003-07-31 Schott Glas Method for positioning glass/quartz/plastic fibres, inserts fibres into drilled holes in preset pattern of holes, into plug or wound around drum

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US4043026A (en) * 1975-06-25 1977-08-23 Felten & Guilleaume Carlswerk Ag Method of making connector for light-conductive fibers
US4193662A (en) * 1977-08-09 1980-03-18 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Broadband switching system utilizing optical fiber waveguides
US4220396A (en) * 1977-04-14 1980-09-02 International Standard Electric Corporation Fiber optic switch
DE3012450A1 (en) * 1980-03-31 1981-10-08 Siemens AG, 1000 Berlin und 8000 München Switch for optical connections between light conductor pairs - has sliding block between main conductors carrying parallel and crossed-over lengths of light conductors for diverting light signals
FR2479993A1 (en) * 1980-04-04 1981-10-09 Thomson Csf Mechanically operated switch for fibre=optic transmission lines - has movable plate on which are mounted intermediate fibres which connect incident and outgoing fibres between two positions
US4325604A (en) * 1978-09-28 1982-04-20 Siemens Aktiengesellschaft Input and output coupler device

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DE2704984A1 (en) * 1977-02-07 1978-08-10 Siemens Ag SWITCH FOR FIBER OPERATING FIBERS
JPS53112762A (en) * 1977-03-14 1978-10-02 Fujitsu Ltd Photo switching element
JPS5542262A (en) * 1978-09-19 1980-03-25 Sumitomo Electric Ind Ltd Optical fiber cutting method
DE2841140C2 (en) * 1978-09-21 1983-08-25 Siemens AG, 1000 Berlin und 8000 München Switches for optical fibers
DE3036950A1 (en) * 1980-09-30 1982-05-13 Siemens AG, 1000 Berlin und 8000 München FIBER OPTICAL BRIDGE SWITCH
CA1160489A (en) * 1980-11-24 1984-01-17 William C. Young Optical fiber switch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043026A (en) * 1975-06-25 1977-08-23 Felten & Guilleaume Carlswerk Ag Method of making connector for light-conductive fibers
US4220396A (en) * 1977-04-14 1980-09-02 International Standard Electric Corporation Fiber optic switch
US4193662A (en) * 1977-08-09 1980-03-18 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Broadband switching system utilizing optical fiber waveguides
US4325604A (en) * 1978-09-28 1982-04-20 Siemens Aktiengesellschaft Input and output coupler device
DE3012450A1 (en) * 1980-03-31 1981-10-08 Siemens AG, 1000 Berlin und 8000 München Switch for optical connections between light conductor pairs - has sliding block between main conductors carrying parallel and crossed-over lengths of light conductors for diverting light signals
FR2479993A1 (en) * 1980-04-04 1981-10-09 Thomson Csf Mechanically operated switch for fibre=optic transmission lines - has movable plate on which are mounted intermediate fibres which connect incident and outgoing fibres between two positions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4804241A (en) * 1986-12-08 1989-02-14 Chevron Research Company Optical fiber holder
EP0883011A1 (en) * 1997-06-06 1998-12-09 Lucent Technologies Inc. Optical fiber switch having enhanced alignment
US5920665A (en) * 1997-06-06 1999-07-06 Lucent Technologies Inc. Mechanical optical fiber switch having enhanced alignment

Also Published As

Publication number Publication date
ES8405163A1 (en) 1984-05-16
FI832201L (en) 1984-01-02
CA1225821A (en) 1987-08-25
DK301883D0 (en) 1983-06-30
NO832397L (en) 1984-01-02
EP0098816A2 (en) 1984-01-18
EP0098816A3 (en) 1986-02-19
SE8204086D0 (en) 1982-07-01
DK301883A (en) 1984-01-02
FI832201A0 (en) 1983-06-16
ES523715A0 (en) 1984-05-16
JPS5922004A (en) 1984-02-04
SE8204086L (en) 1984-01-02

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